Oro Grande District

Posted July 16, 2009 in Gold Mining
Publication Info: Gold Districts of California Bulletin 193 California Division of Mines and Geology 1976 Table of Contents

This district is in southwestern San Bernardino County, in the vicinity of the town of Oro Grande, about five miles north of Victorville and 45 miles north of San Bernardino. The gold mines were active during the 1880s, early 1900s and again in the 1930s. Large amounts of cement are produced here now.

Geology and Ore Deposits
Most of the deposits are in the hills northeast of Oro Grande. According to Bowen (1954), the area is underlain by schist, quartzite and limestone of the Oro Grande series (Carboniferous), dacite, rhyolite, and latite of the Sidewinder volcanic Series (Triassic (?)); and quartz monzonite. The quartz veins are narrow, and the ore bodies usually are small and irregular. Most of the ore has come from the oxidized zone near the surface, but a few high-grade pockets have been found in the veins. The ore contains free gold and often abundant sulfides, including pyrite, chalcopyrite, sphalerite, and bornite. The Carbonate mine has yielded appreciable amounts of gold- and silver-bearing lead carbonate.

Apex, Branch, Carbonate, Dents Grandview Lode, Gold Bullion, Gold King, Oro Grande I and II, Sidewinder, Western States.

Bowen, O. E., Jr., 1954, Geology and mineral deposits of the Barstow quadrangle, California: Calif. Div. Mines Bull. 165, pp. 123-134.

Page 1 of 1

Did You Know.......

A mine is a hole in the ground, owned by a liar.
-Mark Twain


Recent Posts

Popular Tags

1906 San Francisco Earthquake Best Historical Photos Best Of Mining Era Structures Cemeteries Churches Gambling Towns Headframes Historical Commercial Buildings Historical Homes Hotels Mining Machinery Smelters Stamp Mills Victorian Homes Winter Scenes View All Tags